Focimeter
Pronunciation : Fo*cim"e*ter
Part of Speech : n.
Etymology : [Focus + -meter.]
Definition : Defn: (Photog.) An assisting instrument for focusing an object in or before a camera. Knight.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder